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[deliverable/linux.git] / drivers / scsi / sata_sil24.c
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edb33667
TH		 1/*
2 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
3 *
4 * Copyright 2005 Tejun Heo
5 *
6 * Based on preview driver from Silicon Image.
7 *
8 * NOTE: No NCQ/ATAPI support yet. The preview driver didn't support
9 * NCQ nor ATAPI, and, unfortunately, I couldn't find out how to make
10 * those work. Enabling those shouldn't be difficult. Basic
11 * structure is all there (in libata-dev tree). If you have any
12 * information about this hardware, please contact me or linux-ide.
13 * Info is needed on...
14 *
15 * - How to issue tagged commands and turn on sactive on issue accordingly.
16 * - Where to put an ATAPI command and how to tell the device to send it.
17 * - How to enable/use 64bit.
18 *
19 * This program is free software; you can redistribute it and/or modify it
20 * under the terms of the GNU General Public License as published by the
21 * Free Software Foundation; either version 2, or (at your option) any
22 * later version.
23 *
24 * This program is distributed in the hope that it will be useful, but
25 * WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * General Public License for more details.
28 *
29 */
30
31#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/pci.h>
34#include <linux/blkdev.h>
35#include <linux/delay.h>
36#include <linux/interrupt.h>
37#include <linux/dma-mapping.h>
38#include <scsi/scsi_host.h>
39#include "scsi.h"
40#include <linux/libata.h>
41#include <asm/io.h>
42
43#define DRV_NAME "sata_sil24"
923f1225 44#define DRV_VERSION "0.21" /* Silicon Image's preview driver was 0.10 */
edb33667
TH		 45
46#define NR_PORTS 4
47
48/*
49 * Port request block (PRB) 32 bytes
50 */
51struct sil24_prb {
52 u16 ctrl;
53 u16 prot;
54 u32 rx_cnt;
55 u8 fis[6 * 4];
56};
57
58/*
59 * Scatter gather entry (SGE) 16 bytes
60 */
61struct sil24_sge {
62 u64 addr;
63 u32 cnt;
64 u32 flags;
65};
66
67/*
68 * Port multiplier
69 */
70struct sil24_port_multiplier {
71 u32 diag;
72 u32 sactive;
73};
74
75enum {
76 /*
77 * Global controller registers (128 bytes @ BAR0)
78 */
79 /* 32 bit regs */
80 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
81 HOST_CTRL = 0x40,
82 HOST_IRQ_STAT = 0x44,
83 HOST_PHY_CFG = 0x48,
84 HOST_BIST_CTRL = 0x50,
85 HOST_BIST_PTRN = 0x54,
86 HOST_BIST_STAT = 0x58,
87 HOST_MEM_BIST_STAT = 0x5c,
88 HOST_FLASH_CMD = 0x70,
89 /* 8 bit regs */
90 HOST_FLASH_DATA = 0x74,
91 HOST_TRANSITION_DETECT = 0x75,
92 HOST_GPIO_CTRL = 0x76,
93 HOST_I2C_ADDR = 0x78, /* 32 bit */
94 HOST_I2C_DATA = 0x7c,
95 HOST_I2C_XFER_CNT = 0x7e,
96 HOST_I2C_CTRL = 0x7f,
97
98 /* HOST_SLOT_STAT bits */
99 HOST_SSTAT_ATTN = (1 << 31),
100
101 /*
102 * Port registers
103 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
104 */
105 PORT_REGS_SIZE = 0x2000,
106 PORT_PRB = 0x0000, /* (32 bytes PRB + 16 bytes SGEs * 6) * 31 (3968 bytes) */
edb33667
TH		 107
108 PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */
109 /* 32 bit regs */
83bbecc9
TH		 110 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
111 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
112 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
113 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
114 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
edb33667 115 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
83bbecc9
TH		 116 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
117 PORT_CMD_ERR = 0x1024, /* command error number */
edb33667
TH		 118 PORT_FIS_CFG = 0x1028,
119 PORT_FIFO_THRES = 0x102c,
120 /* 16 bit regs */
121 PORT_DECODE_ERR_CNT = 0x1040,
122 PORT_DECODE_ERR_THRESH = 0x1042,
123 PORT_CRC_ERR_CNT = 0x1044,
124 PORT_CRC_ERR_THRESH = 0x1046,
125 PORT_HSHK_ERR_CNT = 0x1048,
126 PORT_HSHK_ERR_THRESH = 0x104a,
127 /* 32 bit regs */
128 PORT_PHY_CFG = 0x1050,
129 PORT_SLOT_STAT = 0x1800,
130 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
131 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
132 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
133 PORT_SCONTROL = 0x1f00,
134 PORT_SSTATUS = 0x1f04,
135 PORT_SERROR = 0x1f08,
136 PORT_SACTIVE = 0x1f0c,
137
138 /* PORT_CTRL_STAT bits */
139 PORT_CS_PORT_RST = (1 << 0), /* port reset */
140 PORT_CS_DEV_RST = (1 << 1), /* device reset */
141 PORT_CS_INIT = (1 << 2), /* port initialize */
142 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
e382eb1d
TH		 143 PORT_CS_RESUME = (1 << 6), /* port resume */
144 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
145 PORT_CS_PM_EN = (1 << 13), /* port multiplier enable */
146 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
edb33667
TH		 147
148 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
149 /* bits[11:0] are masked */
150 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
151 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
152 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
153 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
154 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
155 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
156 PORT_IRQ_UNK_FIS = (1 << 6), /* Unknown FIS received */
157 PORT_IRQ_SDB_FIS = (1 << 11), /* SDB FIS received */
158
159 /* bits[27:16] are unmasked (raw) */
160 PORT_IRQ_RAW_SHIFT = 16,
161 PORT_IRQ_MASKED_MASK = 0x7ff,
162 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
163
164 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
165 PORT_IRQ_STEER_SHIFT = 30,
166 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
167
168 /* PORT_CMD_ERR constants */
169 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
170 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
171 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
172 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
173 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
174 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
175 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
176 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
177 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
178 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
179 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
180 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
181 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
182 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
183 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
184 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
185 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
186 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
187 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
188 PORT_CERR_XFR_MSGABRT = 34, /* PSD ecode 10 - master abort */
189 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
83bbecc9 190 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
edb33667
TH		 191
192 /*
193 * Other constants
194 */
195 SGE_TRM = (1 << 31), /* Last SGE in chain */
196 PRB_SOFT_RST = (1 << 7), /* Soft reset request (ign BSY?) */
197
198 /* board id */
199 BID_SIL3124 = 0,
200 BID_SIL3132 = 1,
201
202 IRQ_STAT_4PORTS = 0xf,
203};
204
205struct sil24_cmd_block {
206 struct sil24_prb prb;
207 struct sil24_sge sge[LIBATA_MAX_PRD];
208};
209
210/*
211 * ap->private_data
212 *
213 * The preview driver always returned 0 for status. We emulate it
214 * here from the previous interrupt.
215 */
216struct sil24_port_priv {
edb33667
TH		 217 struct sil24_cmd_block *cmd_block; /* 32 cmd blocks */
218 dma_addr_t cmd_block_dma; /* DMA base addr for them */
219};
220
221/* ap->host_set->private_data */
222struct sil24_host_priv {
223 void *host_base; /* global controller control (128 bytes @BAR0) */
224 void *port_base; /* port registers (4 * 8192 bytes @BAR2) */
225};
226
227static u8 sil24_check_status(struct ata_port *ap);
228static u8 sil24_check_err(struct ata_port *ap);
229static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
230static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
231static void sil24_phy_reset(struct ata_port *ap);
232static void sil24_qc_prep(struct ata_queued_cmd *qc);
233static int sil24_qc_issue(struct ata_queued_cmd *qc);
234static void sil24_irq_clear(struct ata_port *ap);
235static void sil24_eng_timeout(struct ata_port *ap);
236static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
237static int sil24_port_start(struct ata_port *ap);
238static void sil24_port_stop(struct ata_port *ap);
239static void sil24_host_stop(struct ata_host_set *host_set);
240static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
241
242static struct pci_device_id sil24_pci_tbl[] = {
243 { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
244 { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 },
245};
246
247static struct pci_driver sil24_pci_driver = {
248 .name = DRV_NAME,
249 .id_table = sil24_pci_tbl,
250 .probe = sil24_init_one,
251 .remove = ata_pci_remove_one, /* safe? */
252};
253
254static Scsi_Host_Template sil24_sht = {
255 .module = THIS_MODULE,
256 .name = DRV_NAME,
257 .ioctl = ata_scsi_ioctl,
258 .queuecommand = ata_scsi_queuecmd,
259 .eh_strategy_handler = ata_scsi_error,
260 .can_queue = ATA_DEF_QUEUE,
261 .this_id = ATA_SHT_THIS_ID,
262 .sg_tablesize = LIBATA_MAX_PRD,
263 .max_sectors = ATA_MAX_SECTORS,
264 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
265 .emulated = ATA_SHT_EMULATED,
266 .use_clustering = ATA_SHT_USE_CLUSTERING,
267 .proc_name = DRV_NAME,
268 .dma_boundary = ATA_DMA_BOUNDARY,
269 .slave_configure = ata_scsi_slave_config,
270 .bios_param = ata_std_bios_param,
271 .ordered_flush = 1, /* NCQ not supported yet */
272};
273
274static struct ata_port_operations sil24_ops = {
275 .port_disable = ata_port_disable,
276
277 .check_status = sil24_check_status,
278 .check_altstatus = sil24_check_status,
279 .check_err = sil24_check_err,
280 .dev_select = ata_noop_dev_select,
281
282 .phy_reset = sil24_phy_reset,
283
284 .qc_prep = sil24_qc_prep,
285 .qc_issue = sil24_qc_issue,
286
287 .eng_timeout = sil24_eng_timeout,
288
289 .irq_handler = sil24_interrupt,
290 .irq_clear = sil24_irq_clear,
291
292 .scr_read = sil24_scr_read,
293 .scr_write = sil24_scr_write,
294
295 .port_start = sil24_port_start,
296 .port_stop = sil24_port_stop,
297 .host_stop = sil24_host_stop,
298};
299
300static struct ata_port_info sil24_port_info[] = {
301 /* sil_3124 */
302 {
303 .sht = &sil24_sht,
304 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
305 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
306 ATA_FLAG_PIO_DMA,
307 .pio_mask = 0x1f, /* pio0-4 */
308 .mwdma_mask = 0x07, /* mwdma0-2 */
309 .udma_mask = 0x3f, /* udma0-5 */
310 .port_ops = &sil24_ops,
311 },
312 /* sil_3132 */
313 {
314 .sht = &sil24_sht,
315 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
316 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
317 ATA_FLAG_PIO_DMA,
318 .pio_mask = 0x1f, /* pio0-4 */
319 .mwdma_mask = 0x07, /* mwdma0-2 */
320 .udma_mask = 0x3f, /* udma0-5 */
321 .port_ops = &sil24_ops,
322 },
323};
324
325static u8 sil24_check_status(struct ata_port *ap)
326{
327 return ATA_DRDY;
328}
329
330static u8 sil24_check_err(struct ata_port *ap)
331{
332 return 0;
333}
334
335static int sil24_scr_map[] = {
336 [SCR_CONTROL] = 0,
337 [SCR_STATUS] = 1,
338 [SCR_ERROR] = 2,
339 [SCR_ACTIVE] = 3,
340};
341
342static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg)
343{
344 void *scr_addr = (void *)ap->ioaddr.scr_addr;
345 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
346 void *addr;
347 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
348 return readl(scr_addr + sil24_scr_map[sc_reg] * 4);
349 }
350 return 0xffffffffU;
351}
352
353static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
354{
355 void *scr_addr = (void *)ap->ioaddr.scr_addr;
356 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
357 void *addr;
358 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
359 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
360 }
361}
362
363static void sil24_phy_reset(struct ata_port *ap)
364{
365 __sata_phy_reset(ap);
366 /*
367 * No ATAPI yet. Just unconditionally indicate ATA device.
368 * If ATAPI device is attached, it will fail ATA_CMD_ID_ATA
369 * and libata core will ignore the device.
370 */
371 if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
372 ap->device[0].class = ATA_DEV_ATA;
373}
374
375static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
376 struct sil24_cmd_block *cb)
377{
378 struct scatterlist *sg = qc->sg;
379 struct sil24_sge *sge = cb->sge;
380 unsigned i;
381
382 for (i = 0; i < qc->n_elem; i++, sg++, sge++) {
383 sge->addr = cpu_to_le64(sg_dma_address(sg));
384 sge->cnt = cpu_to_le32(sg_dma_len(sg));
385 sge->flags = 0;
386 sge->flags = i < qc->n_elem - 1 ? 0 : cpu_to_le32(SGE_TRM);
387 }
388}
389
390static void sil24_qc_prep(struct ata_queued_cmd *qc)
391{
392 struct ata_port *ap = qc->ap;
393 struct sil24_port_priv *pp = ap->private_data;
394 struct sil24_cmd_block *cb = pp->cmd_block + qc->tag;
395 struct sil24_prb *prb = &cb->prb;
396
397 switch (qc->tf.protocol) {
398 case ATA_PROT_PIO:
399 case ATA_PROT_DMA:
400 case ATA_PROT_NODATA:
401 break;
402 default:
403 /* ATAPI isn't supported yet */
404 BUG();
405 }
406
407 ata_tf_to_fis(&qc->tf, prb->fis, 0);
408
409 if (qc->flags & ATA_QCFLAG_DMAMAP)
410 sil24_fill_sg(qc, cb);
411}
412
413static int sil24_qc_issue(struct ata_queued_cmd *qc)
414{
415 struct ata_port *ap = qc->ap;
4f50c3cb 416 void *port = (void *)ap->ioaddr.cmd_addr;
edb33667
TH		 417 struct sil24_port_priv *pp = ap->private_data;
418 dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block);
419
4f50c3cb 420 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
edb33667
TH		 421 return 0;
422}
423
424static void sil24_irq_clear(struct ata_port *ap)
425{
426 /* unused */
427}
428
923f1225 429static int __sil24_reset_controller(void *port)
edb33667 430{
edb33667
TH		 431 int cnt;
432 u32 tmp;
433
edb33667
TH		 434 /* Reset controller state. Is this correct? */
435 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
436 readl(port + PORT_CTRL_STAT); /* sync */
437
438 /* Max ~100ms */
439 for (cnt = 0; cnt < 1000; cnt++) {
440 udelay(100);
441 tmp = readl(port + PORT_CTRL_STAT);
442 if (!(tmp & PORT_CS_DEV_RST))
443 break;
444 }
923f1225 445
edb33667 446 if (tmp & PORT_CS_DEV_RST)
923f1225
TH		 447 return -1;
448 return 0;
449}
450
451static void sil24_reset_controller(struct ata_port *ap)
452{
453 printk(KERN_NOTICE DRV_NAME
454 " ata%u: resetting controller...\n", ap->id);
455 if (__sil24_reset_controller((void *)ap->ioaddr.cmd_addr))
456 printk(KERN_ERR DRV_NAME
457 " ata%u: failed to reset controller\n", ap->id);
edb33667
TH		 458}
459
460static void sil24_eng_timeout(struct ata_port *ap)
461{
462 struct ata_queued_cmd *qc;
463
464 qc = ata_qc_from_tag(ap, ap->active_tag);
465 if (!qc) {
466 printk(KERN_ERR "ata%u: BUG: tiemout without command\n",
467 ap->id);
468 return;
469 }
470
471 /*
472 * hack alert! We cannot use the supplied completion
473 * function from inside the ->eh_strategy_handler() thread.
474 * libata is the only user of ->eh_strategy_handler() in
475 * any kernel, so the default scsi_done() assumes it is
476 * not being called from the SCSI EH.
477 */
478 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
479 qc->scsidone = scsi_finish_command;
480 ata_qc_complete(qc, ATA_ERR);
481
482 sil24_reset_controller(ap);
483}
484
8746618d
TH		 485static void sil24_error_intr(struct ata_port *ap, u32 slot_stat)
486{
487 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
4f50c3cb 488 void *port = (void *)ap->ioaddr.cmd_addr;
8746618d
TH		 489 u32 irq_stat, cmd_err, sstatus, serror;
490
491 irq_stat = readl(port + PORT_IRQ_STAT);
492 cmd_err = readl(port + PORT_CMD_ERR);
493 sstatus = readl(port + PORT_SSTATUS);
494 serror = readl(port + PORT_SERROR);
495
496 /* Clear IRQ/errors */
497 writel(irq_stat, port + PORT_IRQ_STAT);
498 if (cmd_err)
499 writel(cmd_err, port + PORT_CMD_ERR);
500 if (serror)
501 writel(serror, port + PORT_SERROR);
502
503 printk(KERN_ERR DRV_NAME " ata%u: error interrupt on port%d\n"
504 " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n",
505 ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror);
506
507 if (qc)
508 ata_qc_complete(qc, ATA_ERR);
509
510 sil24_reset_controller(ap);
511}
512
edb33667
TH		 513static inline void sil24_host_intr(struct ata_port *ap)
514{
515 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
4f50c3cb 516 void *port = (void *)ap->ioaddr.cmd_addr;
edb33667
TH		 517 u32 slot_stat;
518
519 slot_stat = readl(port + PORT_SLOT_STAT);
520 if (!(slot_stat & HOST_SSTAT_ATTN)) {
521 if (qc)
522 ata_qc_complete(qc, 0);
8746618d
TH		 523 } else
524 sil24_error_intr(ap, slot_stat);
edb33667
TH		 525}
526
527static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
528{
529 struct ata_host_set *host_set = dev_instance;
530 struct sil24_host_priv *hpriv = host_set->private_data;
531 unsigned handled = 0;
532 u32 status;
533 int i;
534
535 status = readl(hpriv->host_base + HOST_IRQ_STAT);
536
06460aea
TH		 537 if (status == 0xffffffff) {
538 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
539 "PCI fault or device removal?\n");
540 goto out;
541 }
542
edb33667
TH		 543 if (!(status & IRQ_STAT_4PORTS))
544 goto out;
545
546 spin_lock(&host_set->lock);
547
548 for (i = 0; i < host_set->n_ports; i++)
549 if (status & (1 << i)) {
550 struct ata_port *ap = host_set->ports[i];
3cc4571c 551 if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) {
edb33667 552 sil24_host_intr(host_set->ports[i]);
3cc4571c
TH		 553 handled++;
554 } else
555 printk(KERN_ERR DRV_NAME
556 ": interrupt from disabled port %d\n", i);
edb33667
TH		 557 }
558
559 spin_unlock(&host_set->lock);
560 out:
561 return IRQ_RETVAL(handled);
562}
563
564static int sil24_port_start(struct ata_port *ap)
565{
566 struct device *dev = ap->host_set->dev;
edb33667
TH		 567 struct sil24_port_priv *pp;
568 struct sil24_cmd_block *cb;
569 size_t cb_size = sizeof(*cb);
570 dma_addr_t cb_dma;
571
572 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
573 if (!pp)
574 return -ENOMEM;
575 memset(pp, 0, sizeof(*pp));
576
577 cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
578 if (!cb) {
579 kfree(pp);
580 return -ENOMEM;
581 }
582 memset(cb, 0, cb_size);
583
edb33667
TH		 584 pp->cmd_block = cb;
585 pp->cmd_block_dma = cb_dma;
586
587 ap->private_data = pp;
588
589 return 0;
590}
591
592static void sil24_port_stop(struct ata_port *ap)
593{
594 struct device *dev = ap->host_set->dev;
595 struct sil24_port_priv *pp = ap->private_data;
596 size_t cb_size = sizeof(*pp->cmd_block);
597
598 dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);
599 kfree(pp);
600}
601
602static void sil24_host_stop(struct ata_host_set *host_set)
603{
604 struct sil24_host_priv *hpriv = host_set->private_data;
605
606 iounmap(hpriv->host_base);
607 iounmap(hpriv->port_base);
608 kfree(hpriv);
609}
610
611static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
612{
613 static int printed_version = 0;
614 unsigned int board_id = (unsigned int)ent->driver_data;
615 struct ata_probe_ent *probe_ent = NULL;
616 struct sil24_host_priv *hpriv = NULL;
617 void *host_base = NULL, *port_base = NULL;
618 int i, rc;
619
620 if (!printed_version++)
621 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
622
623 rc = pci_enable_device(pdev);
624 if (rc)
625 return rc;
626
627 rc = pci_request_regions(pdev, DRV_NAME);
628 if (rc)
629 goto out_disable;
630
631 rc = -ENOMEM;
632 /* ioremap mmio registers */
633 host_base = ioremap(pci_resource_start(pdev, 0),
634 pci_resource_len(pdev, 0));
635 if (!host_base)
636 goto out_free;
637 port_base = ioremap(pci_resource_start(pdev, 2),
638 pci_resource_len(pdev, 2));
639 if (!port_base)
640 goto out_free;
641
642 /* allocate & init probe_ent and hpriv */
643 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
644 if (!probe_ent)
645 goto out_free;
646
647 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
648 if (!hpriv)
649 goto out_free;
650
651 memset(probe_ent, 0, sizeof(*probe_ent));
652 probe_ent->dev = pci_dev_to_dev(pdev);
653 INIT_LIST_HEAD(&probe_ent->node);
654
655 probe_ent->sht = sil24_port_info[board_id].sht;
656 probe_ent->host_flags = sil24_port_info[board_id].host_flags;
657 probe_ent->pio_mask = sil24_port_info[board_id].pio_mask;
658 probe_ent->udma_mask = sil24_port_info[board_id].udma_mask;
659 probe_ent->port_ops = sil24_port_info[board_id].port_ops;
660 probe_ent->n_ports = (board_id == BID_SIL3124) ? 4 : 2;
661
662 probe_ent->irq = pdev->irq;
663 probe_ent->irq_flags = SA_SHIRQ;
664 probe_ent->mmio_base = port_base;
665 probe_ent->private_data = hpriv;
666
667 memset(hpriv, 0, sizeof(*hpriv));
668 hpriv->host_base = host_base;
669 hpriv->port_base = port_base;
670
671 /*
672 * Configure the device
673 */
674 /*
675 * FIXME: This device is certainly 64-bit capable. We just
676 * don't know how to use it. After fixing 32bit activation in
677 * this function, enable 64bit masks here.
678 */
679 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
680 if (rc) {
681 printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n",
682 pci_name(pdev));
683 goto out_free;
684 }
685 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
686 if (rc) {
687 printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n",
688 pci_name(pdev));
689 goto out_free;
690 }
691
692 /* GPIO off */
693 writel(0, host_base + HOST_FLASH_CMD);
694
695 /* Mask interrupts during initialization */
696 writel(0, host_base + HOST_CTRL);
697
698 for (i = 0; i < probe_ent->n_ports; i++) {
699 void *port = port_base + i * PORT_REGS_SIZE;
700 unsigned long portu = (unsigned long)port;
701 u32 tmp;
702 int cnt;
703
4f50c3cb 704 probe_ent->port[i].cmd_addr = portu + PORT_PRB;
edb33667
TH		 705 probe_ent->port[i].scr_addr = portu + PORT_SCONTROL;
706
707 ata_std_ports(&probe_ent->port[i]);
708
709 /* Initial PHY setting */
710 writel(0x20c, port + PORT_PHY_CFG);
711
712 /* Clear port RST */
713 tmp = readl(port + PORT_CTRL_STAT);
714 if (tmp & PORT_CS_PORT_RST) {
715 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
716 readl(port + PORT_CTRL_STAT); /* sync */
717 for (cnt = 0; cnt < 10; cnt++) {
718 msleep(10);
719 tmp = readl(port + PORT_CTRL_STAT);
720 if (!(tmp & PORT_CS_PORT_RST))
721 break;
722 }
723 if (tmp & PORT_CS_PORT_RST)
724 printk(KERN_ERR DRV_NAME
725 "(%s): failed to clear port RST\n",
726 pci_name(pdev));
727 }
728
729 /* Zero error counters. */
730 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
731 writel(0x8000, port + PORT_CRC_ERR_THRESH);
732 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
733 writel(0x0000, port + PORT_DECODE_ERR_CNT);
734 writel(0x0000, port + PORT_CRC_ERR_CNT);
735 writel(0x0000, port + PORT_HSHK_ERR_CNT);
736
737 /* FIXME: 32bit activation? */
738 writel(0, port + PORT_ACTIVATE_UPPER_ADDR);
739 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_STAT);
740
741 /* Configure interrupts */
742 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
743 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | PORT_IRQ_SDB_FIS,
744 port + PORT_IRQ_ENABLE_SET);
745
746 /* Clear interrupts */
747 writel(0x0fff0fff, port + PORT_IRQ_STAT);
748 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
923f1225
TH		 749
750 /* Clear port multiplier enable and resume bits */
751 writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR);
752
753 /* Reset itself */
754 if (__sil24_reset_controller(port))
755 printk(KERN_ERR DRV_NAME
756 "(%s): failed to reset controller\n",
757 pci_name(pdev));
edb33667
TH		 758 }
759
760 /* Turn on interrupts */
761 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
762
763 pci_set_master(pdev);
764
1483467f 765 /* FIXME: check ata_device_add return value */
edb33667
TH		 766 ata_device_add(probe_ent);
767
768 kfree(probe_ent);
769 return 0;
770
771 out_free:
772 if (host_base)
773 iounmap(host_base);
774 if (port_base)
775 iounmap(port_base);
776 kfree(probe_ent);
777 kfree(hpriv);
778 pci_release_regions(pdev);
779 out_disable:
780 pci_disable_device(pdev);
781 return rc;
782}
783
784static int __init sil24_init(void)
785{
786 return pci_module_init(&sil24_pci_driver);
787}
788
789static void __exit sil24_exit(void)
790{
791 pci_unregister_driver(&sil24_pci_driver);
792}
793
794MODULE_AUTHOR("Tejun Heo");
795MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
796MODULE_LICENSE("GPL");
797MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
798
799module_init(sil24_init);
800module_exit(sil24_exit);
Linux kernel - Deliverables
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